[TabManager] Move TabManager into chrome/browser/resource_coordinator.

chrome/browser/memory/tab_manager_observer.cc

Index: chrome/browser/memory/tab_manager_observer.cc
diff --git a/chrome/browser/memory/tab_manager_observer.cc b/chrome/browser/memory/tab_manager_observer.cc
deleted file mode 100644
index 782a15875bb4176be204d49e7927de6571eab19b..0000000000000000000000000000000000000000
--- a/chrome/browser/memory/tab_manager_observer.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/memory/tab_manager_observer.h"
-
-namespace content {
-class WebContents;
-}
-
-namespace memory {
-
-void TabManagerObserver::OnDiscardedStateChange(content::WebContents* contents,
-                                                bool is_discarded) {}
-
-void TabManagerObserver::OnAutoDiscardableStateChange(
-    content::WebContents* contents,
-    bool is_auto_discardable) {}
-
-TabManagerObserver::~TabManagerObserver() {}
-
-}  // namespace memory